The Clarion Inn and the nearby Maid-Rite restaurant reopened Saturday, followed by the Wasserbahn and Seven Villages Restaurant on Sunday, manager Renee Driscoll said.

Casey's Convenience Store, also located at the Williamsburg exit of Interstate 80, was never closed, but had been prohibited from preparing food. That ban has been lifted, Driscoll said, but the store still needed to flush its fountain pop machine Monday.

The businesses, all owned by Young Been Kim of Des Moines, were closed July 6 after the company's internal water testing showed the presence of E. coli bacteria in the hotel's well. Subsequent tests did not turn up any E. coli, but revealed coliform bacteria that should not have been present in the hotel's water treatment system, state officials said.